Sludge is a thick, tar-like build-up that can form when engines face severe use; stop-and-go traffic, poor fuel quality, harsh temperatures, or extended oil change intervals. Premium 10W-40 conventional motor oil for gasoline engines.
This oil blend includes advanced additives for improved performance and protection. Synthetic Blend Motor Oils. versus JASO MA-2 oil without Actibond in cam wear index tested. Motor Oil Viscosity. Motor Oil Type.
